my host server is blocked from "robots.txt" file

My host company could not tell if my site was compromised by a robots.txt file or not. When they search for it, this firewall plugin stops them. That file is listed in numerous emails relating to attempts to attack my site. Does this plugin add that file to my site? There is a WEBPAGE with that name hidden from my sitemap. it is: http://www.cherylcope.com/robots.txt and when I go to that url in my web browser it says:
User-agent: *
Disallow: /wp-admin/
Disallow: /wp-includes/